1 #include <msp/core/raii.h>
2 #include <msp/gl/extensions/arb_direct_state_access.h>
3 #include <msp/gl/extensions/arb_instanced_arrays.h>
4 #include <msp/gl/extensions/arb_vertex_array_object.h>
5 #include <msp/gl/extensions/arb_vertex_attrib_binding.h>
6 #include <msp/gl/extensions/arb_vertex_buffer_object.h>
7 #include <msp/gl/extensions/arb_vertex_shader.h>
8 #include <msp/gl/extensions/ext_gpu_shader4.h>
9 #include <msp/gl/extensions/khr_debug.h>
11 #include "deviceinfo.h"
14 #include "vertexarray.h"
15 #include "vertexsetup.h"
22 VertexSetup::VertexSetup():
27 index_type(UNSIGNED_SHORT)
29 static Require req(ARB_vertex_array_object);
30 if(ARB_direct_state_access)
31 glCreateVertexArrays(1, &id);
33 glGenVertexArrays(1, &id);
36 VertexSetup::~VertexSetup()
38 glDeleteVertexArrays(1, &id);
41 void VertexSetup::set_format(const VertexFormat &vfmt)
43 if(!verify_format(vfmt))
44 throw invalid_argument("VertexSetup::set_format");
45 if(!vertex_format.empty())
46 throw invalid_operation("VertexSetup::set_format");
53 void VertexSetup::set_format_instanced(const VertexFormat &vfmt, const VertexFormat &ifmt)
55 if(!verify_format(vfmt) || !verify_format(ifmt))
56 throw invalid_argument("VertexSetup::set_format");
57 if(!vertex_format.empty())
58 throw invalid_operation("VertexSetup::set_format");
67 void VertexSetup::set_vertex_array(const VertexArray &a)
69 if(vertex_format.empty())
70 throw invalid_operation("VertexSetup::set_vertex_array");
71 if(a.get_format()!=vertex_format)
72 throw incompatible_data("VertexSetup::set_vertex_array");
74 throw invalid_argument("VertexSetup::set_vertex_array");
77 dirty |= VERTEX_ARRAY;
80 void VertexSetup::set_instance_array(const VertexArray &a)
82 if(inst_format.empty())
83 throw invalid_operation("VertexSetup::set_instance_array");
84 if(a.get_format()!=inst_format)
85 throw incompatible_data("VertexSetup::set_instance_array");
87 throw invalid_argument("VertexSetup::set_instance_array");
89 static Require req(ARB_instanced_arrays);
92 dirty |= INSTANCE_ARRAY;
95 void VertexSetup::set_index_buffer(const Buffer &ibuf, DataType itype)
99 dirty |= INDEX_BUFFER;
102 bool VertexSetup::verify_format(const VertexFormat &fmt)
107 unsigned max_attribs = Limits::get_global().max_vertex_attributes;
109 for(VertexAttribute a: fmt)
110 if(get_attribute_semantic(a)>=max_attribs)
116 void VertexSetup::require_format(const VertexFormat &fmt)
118 bool has_int = false;
119 for(VertexAttribute a: fmt)
120 has_int = has_int | is_integer_attribute(a);
123 static Require _req(EXT_gpu_shader4);
126 void VertexSetup::update() const
128 static bool direct = ARB_direct_state_access && ARB_vertex_attrib_binding;
130 if(dirty&VERTEX_ARRAY)
131 update_vertex_array(*vertex_array, 0, 0, direct);
133 if(dirty&INSTANCE_ARRAY)
134 update_vertex_array(*inst_array, 1, 1, direct);
136 if(dirty&INDEX_BUFFER)
139 glVertexArrayElementBuffer(id, index_buffer->id);
141 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer->id);
147 void VertexSetup::update_vertex_array(const VertexArray &array, unsigned binding, unsigned divisor, bool direct) const
151 Buffer::unbind_scratch();
152 glBindBuffer(GL_ARRAY_BUFFER, array.get_buffer()->id);
155 const VertexFormat &fmt = array.get_format();
156 unsigned stride = fmt.stride();
159 glVertexArrayVertexBuffer(id, binding, array.get_buffer()->id, 0, stride);
160 glVertexArrayBindingDivisor(id, binding, divisor);
164 for(VertexAttribute a: fmt)
166 unsigned sem = get_attribute_semantic(a);
167 bool integer = is_integer_attribute(a);
168 GLenum type = get_gl_type(get_attribute_source_type(a));
169 unsigned cc = get_attribute_component_count(a);
173 glVertexArrayAttribIFormat(id, sem, cc, type, offset);
175 glVertexArrayAttribFormat(id, sem, cc, type, true, offset);
176 glVertexArrayAttribBinding(id, sem, binding);
177 glEnableVertexArrayAttrib(id, sem);
182 glVertexAttribIPointer(sem, cc, type, stride, reinterpret_cast<void *>(offset));
184 glVertexAttribPointer(sem, cc, type, true, stride, reinterpret_cast<void *>(offset));
185 if(ARB_instanced_arrays)
186 glVertexAttribDivisor(sem, divisor);
187 glEnableVertexAttribArray(sem);
189 offset += get_attribute_size(a);
193 glBindBuffer(GL_ARRAY_BUFFER, 0);
196 void VertexSetup::unload()
198 if(ARB_direct_state_access)
200 glVertexArrayVertexBuffer(id, 0, 0, 0, 0);
201 glVertexArrayVertexBuffer(id, 1, 0, 0, 0);
202 glVertexArrayElementBuffer(id, 0);
206 glBindVertexArray(id);
207 glBindBuffer(GL_ARRAY_BUFFER, 0);
209 for(VertexAttribute a: vertex_format)
211 unsigned sem = get_attribute_semantic(a);
212 glDisableVertexAttribArray(sem);
213 glVertexAttribPointer(sem, 1, GL_FLOAT, false, 0, 0);
215 for(VertexAttribute a: inst_format)
217 unsigned sem = get_attribute_semantic(a);
218 glDisableVertexAttribArray(sem);
219 glVertexAttribPointer(sem, 1, GL_FLOAT, false, 0, 0);
222 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
226 vertex_format = VertexFormat();
228 inst_format = VertexFormat();
232 void VertexSetup::set_debug_name(const string &name)
236 glObjectLabel(GL_VERTEX_ARRAY, id, name.size(), name.c_str());